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1N4478 Datasheet

Voidless Hermetically Sealed 1.5 Watt Glass Zener Diodes

Manufacturer: Microsemi (now Microchip Technology)

This datasheet includes multiple variants, all published together in a single manufacturer document.

1N4478 Overview

This Zener voltage regulator series is military qualified to MIL-PRF-19500/406 and is ideal for high-reliability applications where a failure cannot be tolerated. These industry-recognized 1.5 watt Zener voltage regulators are hermetically sealed with void-less glass construction using an internal metallurgical bond. It includes Zener selections from 3.3 to 200 volts in standard 5% tolerance.

1N4478 Key Features

  • Popular JEDEC registered series
  • Void-less hermetically sealed glass package
  • Triple-layer passivation
  • Extremely robust constructio

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